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A133111 formatted as a simple table:

n a(n)
1 0
2 0
3 0
4 1
5 16
6 126
7 672
8 2772
9 9504
10 28314
11 75504
12 184041
13 416416
14 884884
15 1782144
16 3426384
17 6325632
18 11267532
19 19442016
20 32605881
21 53300016
22 85131970
23 133138720
24 204246900
25 307850400
26 456528150
27 666928080
28 960846705
29 1366537536

[0,0,0,1,16,126,672,2772,9504,28314,75504,184041,
 416416,884884,1782144,3426384,6325632,11267532,
 19442016,32605881,53300016,85131970,133138720,
 204246900,307850400,456528150,666928080,960846705,
 1366537536]

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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